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Wheel backspacing, 1993 Mustang Notch 5 lug swap

2077 Views 5 Replies 5 Participants Last post by  Old man
Which five lug wheel should I use on my 93 notch? I've done the rear axle swap from a Ranger, and I have 2000 GT stuff up front (balljoints, control arms, etc.) I have a set of 96 cobra wheels on it right now, but they rub a little bit in the back and I really don't want to have to get wheel spacers for it. I was thinking of grabbing a set of wheels off craigslist but I don't know the difference in the backspacing of the wheels.

I guess what I'm asking is that I need to know the backspacing for the following wheels: Bullit wheels from an 03 gt, 96 cobra wheels, and the mach style wheels. I want to stick to factory wheels so my wallet doesn't go dry for a long time haha.
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Luckily stock rims won't dry your wallet.

http://mjbobbitt.home.comcast.net/~mjbobbitt/mustang/5lug.html
Try checking that website.
The author provides several clues to help you choose which rims to use.
Where do they rub exactly?
if they rub on the quad shocks in the rear you can try turning them around.
can't turn the quads around, I've got aftermarket ones that look like actual shocks. KYB or something like that. They rub up in the front, not too awfully bad, but bad enough for me to notice.
Do you know how to measure the backspacing of what you have now???

Lay a straight edge across the inner lip of the rim. Measure the distance from the mounting surface of the center to that staight edge. A stock 16" by 7" wide Pony wheel is just under 5 inches. About 4.8 inches. This sets the INNER spacing of the tire from the shocks and inner wheelwell walls.

If you use more back spacing, the tire moves closer to the shocks. If you use less, it moves out towards the outer fender lip.

If you use a wider rim for a certain amount of back spacing, the outer tire sidewall moves out. The amount it moves out from rim width is complex, and depends on the sidewall construction and tread width.

You could use a spacer if you don't mind the mounting being a little weaker.

Tom
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